I have problem with Xorg 6.8.2 on an Ultra5 400MHz. The card is the well-known ati mach64, the monitor is a 21" sun.
If i test X with "X -config /root/xorg.conf.new", the mode goes back to 640x480. The console works at 1280x1024 resolution and i wanted to use quiet the same (16 or 24bit depth). What's the problem? How can i use 1280x1024 or 1024x768 resolution?
Xorg version: x11-base/xorg-x11-6.8.2-r7
Xorg.conf:
------------
# cat ~/xorg.conf.new
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

In the "Screen" section, you'll need to define the modes you want. I have an old Ultra 5 X config that you can reference here. Keep in mind some of the areas in this config outside of "Screen" section may be out of date, as its been a few years since I had an Ultra 5 with X running on it.

In the "Screen" section, you'll need to define the modes you want. I have an old Ultra 5 X config that you can reference here. Keep in mind some of the areas in this config outside of "Screen" section may be out of date, as its been a few years since I had an Ultra 5 with X running on it.

I tried it, but did not work. I forgot to add the part of the logfile, but as i can remember the proble was out of sync or so (currently i'm at home, i'll post the part of the log tomorrow).

The Log is normal, but it's setting the monitor to a pretty weird mode, and I guess that is what your question is about. Unfortunately, I don't have any mach64 systems, but they are pretty common. If you can, you might join the IRC freenote #gentoo-sparc channel and ask for how other people use sun monitors with mach64.

Finally it's working. Just for the archive:
The problem was that Xorg recognized the monitor refresh rates wrong and could only handle the standard VGA resolution. After adding the correct refresh rates to xorg.conf everything gone well.